Display Faults - Nokia NPD-4 Series Troubleshooting - Bb

NPD-4
Troubleshooting — BB

Display faults

Display faults
Are UI module LEDs
turned on when phone
is turned on or when
making a phone call?
Yes
Display faults 2
Page 38
Measure VBATT
voltage at C310. Is it
No
OK?
Yes
Set phone to LOCAL mode. Use
Phoenix "Message Sender" and
navigate as follows: DEV_HOST ->
DEV_PC -> PN_LIGHT ->
OBJ_ROUTING_REQ -> OBJ_PC ->
UTID -> LIGHT_CONTROL_REQ ->
LIGHT_CONTROL_TARGER_KBD.
Select "LIGHT_STATE_BLINK" and
click "Send"
Measure UEM signal
at R306. Is signal OK?
Yes
Measure voltage at
LEDs. Is it OK?
Yes
Change LEDs
Nokia Corporation
CCS Technical Documentation
Check VBATT line
No
Change UEM
No
Change LM 2795
Confidential Issue 1 02/2003